摘要
建立了测定颗粒物中硝酸盐含量的热转化方法,测试了NH_4NO_3、NaNO_3和KNO_3等硝酸盐的转化效率,在此基础上利用气溶胶发生器产生特定浓度的气溶胶样品,考察了此方法的精密度和线性度等指标,同时与离子色谱分析方法的仪器进行了长期的比对测试。结果显示在有钼催化的条件下,350℃时硝酸铵的转化效率能达到98.3%,测定标样的相对标准偏差为1.4%,两种方法的相关系数r^2=0.8095。充分证明了热转化法对硝酸盐转化效率高、重复性好,与传统离子色谱分析方法相关性较高。
A method was developed for determination of nitrates in particulate matter by the thermal conversion （TC）. The conversion efficiencies of nitrates, such as NHaNO3, NaNO3 and KNO3 were tested. The investigation showed that the conversion efficiency of ammonium nitrate reached 98.3 % under the condition of molybdenum catalysis at 350℃ with the relative standard deviation of 1.4% . The method was compared with ion chromatography （IC）. And the correlation coefficient of the TC and IC was 0. 8095. The consistency between them was good.
作者
杨建虎
王良
李启杰
段佳鹏
靳秀英
田建立
崔延青
张扬
Yang Jianhu Wang Li- ang Li Qijie Duan J iapeng Jin Xiouying Tian Jianli Cui Yanqing Zhang Yang(Hebei Sailhero Environmental Protection Hi-tech. , Ltd., Shijiazhuang 050035, China Wuhan Environ- mental Monitoring Central Station, Wuhan 430022, China Hebei Environmental Information Center, Shijiazhuang 050051, China China Environmental Monitoring Center, Beijing 100012, China)
出处
《分析仪器》
CAS
2017年第5期119-122,共4页
Analytical Instrumentation
关键词
颗粒物
硝酸盐
热转化法
particulate matter
nitrate
thermal conversion
